*{ 
    margin: 0; 
    padding: 0
}

body{  
    width: 100%;
    background:url("3.jpg") no-repeat;
    background-size: 100%;
}

a {
    text-decoration: none;
    color: #000000;
}

.auto-img {
    width: 100%;
}

.box1 {
	overflow: hidden;
}

.logo {
    float: left;
    width: 200px;
    height: 100px;
}

.nav {
    float: left;
    background: rgba(91, 97, 108, 0);
    height: 100px;
    line-height: 100px;
    font-size: 24px;
}

.nav ul li {
    float: left;
    list-style: none;
    padding: 0 10px;
    margin: 0 10px;
}

.nav a:hover {
    color: #ffffff;
}

.zhongjian{ 
	width: 600px; 
	height: 100px;
	border: #FFFFFF 5px solid;
	border-radius: 50px;
	margin: auto;
	margin-top: 200px;
}
.zhongjian li {
	font-size: 40px;
	color: #FFFFFF;
	font-family:"Aunt-沉魅体";
	list-style: none;
	text-align: center;
	line-height: 100px;
}
.zuoping{width: 300px; 
	height: 100px;
	border: #FFFFFF 5px solid;
	border-radius: 50px;
    margin: auto;
	margin-top: 100px;
}
.zuoping li{text-align: center;
	line-height: 100px;
    list-style: none;
	font-size: 50px;
	color: #FFFFFF;
	font-family:"Aunt-沉魅体";	
}
.jianjie{width: 1200px; 
	height: 600px;
	border: #FFFFFF 5px solid;
	border-radius: 50px;
    margin: auto;
	margin-top: 100px;}
.jianjie li p{text-align: center; 
	text-indent: 2em;
}
.jianjie li{list-style: none;
	font-size: 40px;
	color: #FFFFFF;
	font-family:"Aunt-沉魅体";	
}
.lianxi{ width: 600px; height:600px; 
	border: #FFFFFF 5px solid;
    border-radius: 50px;
	margin: auto;
	margin-top: 100px;
    }
.lianxi li{list-style: none;
	margin-top: 100px;
	text-align: center;
	font-size: 40px;
	color: #FFFFFF;
	font-family:"Aunt-沉魅体";	
}